Re: A mail relay server for Debian Members is live

2022-08-16 Thread Bastien Roucariès
Le lundi 15 août 2022, 14:19:57 UTC David Bremner a écrit : > Bastien Roucariès writes: > > Le samedi 16 juillet 2022, 21:49:31 UTC Pierre-Elliott Bécue a écrit : > > Thanks for this hard work, however it seems that some mail client consider > > these mail as invalid, whereas gmail and other

Re: A mail relay server for Debian Members is live

2022-08-15 Thread Marco d'Itri
On Aug 15, Ansgar wrote: > To not look like forged mail, the "From" header field (not the > envelope) has to be validated with either DKIM or SPF. disroot.org > says this is supposed to be the case for mail from their domain: Not exactly. DMARC validation requires that at least one of DKIM or

Re: A mail relay server for Debian Members is live

2022-08-15 Thread Ansgar
On Mon, 2022-08-15 at 23:09 +0530, Praveen Arimbrathodiyil wrote: > I would like to bring up the issue of providers with strict SPF > record, for example disroot.org > > dig -t TXT disroot.org has the relevant line, > disroot.org.3600IN  TXT "v=spf1 a mx -all" > > which

Re: A mail relay server for Debian Members is live

2022-08-15 Thread Praveen Arimbrathodiyil
On 17/07/22 3:19 am, Pierre-Elliott Bécue wrote: Dear developers, In the past months, it's been clear that sending mails from an @debian.org address to some mail providers, including GMail, has become harder and harder. While user DKIM feature (documented on [0]) can help, we thought

Re: A mail relay server for Debian Members is live

2022-08-15 Thread David Bremner
Bastien Roucariès writes: > Le samedi 16 juillet 2022, 21:49:31 UTC Pierre-Elliott Bécue a écrit : > Thanks for this hard work, however it seems that some mail client consider > these mail as invalid, whereas gmail and other verifier service consider ok... > > Any idea for debugging? > >

Re: A mail relay server for Debian Members is live

2022-08-14 Thread Bastien Roucariès
Le samedi 16 juillet 2022, 21:49:31 UTC Pierre-Elliott Bécue a écrit : > Dear developers, > > In the past months, it's been clear that sending mails from an > @debian.org address to some mail providers, including GMail, has become > harder and harder. While user DKIM feature (documented on [0])

Re: A mail relay server for Debian Members is live

2022-07-29 Thread Paride Legovini
Vincent Bernat wrote on 25/07/2022: > Would it be possible to also make it available on port 465 without > STARTTLS? I'd also prefer "full TLS" over STARTTLS, as it is simpler (encryption from the beginning instead starting with a plaintext session) and somehow more secure than STARTTLS, see [1],

Re: A mail relay server for Debian Members is live

2022-07-29 Thread Pierre-Elliott Bécue
Vincent Bernat wrote on 25/07/2022 at 14:58:04+0200: > On 2022-07-16 23:49, Pierre-Elliott Bécue wrote: >> In the past months, it's been clear that sending mails from an >> @debian.org address to some mail providers, including GMail, has become >> harder and harder. While user DKIM feature

Re: A mail relay server for Debian Members is live

2022-07-25 Thread Vincent Bernat
On 2022-07-16 23:49, Pierre-Elliott Bécue wrote: In the past months, it's been clear that sending mails from an @debian.org address to some mail providers, including GMail, has become harder and harder. While user DKIM feature (documented on [0]) can help, we thought providing a relay server for

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Thomas Goirand
On 7/16/22 23:49, Pierre-Elliott Bécue wrote: Dear developers, In the past months, it's been clear that sending mails from an @debian.org address to some mail providers, including GMail, has become harder and harder. While user DKIM feature (documented on [0]) can help, we thought providing a

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Russell Stuart
On 17/7/22 10:37, Ansgar wrote: On Sun, 2022-07-17 at 10:29 +0200, Dominik George wrote: tl;dr: DKIM-signed mail is verifiable, but only the headers; the body can be tampered with; This is just wrong. There is no reason to sign mails to ensure authenticity if one can just change the body...

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Vincent Bernat
On 2022-07-17 10:29, Dominik George wrote: tl;dr: DKIM-signed mail is verifiable, but only the headers; the body can be tampered with That's not true. The body is always part of the signature (in a strict or relaxed way). > The Signer/Verifier MUST compute two hashes: one over the body of

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Adam Borowski
On Sun, Jul 17, 2022 at 10:35:21AM +0200, Ansgar wrote: > On Sun, 2022-07-17 at 10:02 +0200, Mattia Rizzolo wrote: > > At this point, what about SPF?  Ignoring potential whitelists on mail > > receivers, I think using this service doesn't provide extra > > advantages than signing on our own

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Ansgar
On Sun, 2022-07-17 at 10:29 +0200, Dominik George wrote: > tl;dr: DKIM-signed mail is verifiable, but only the headers; the body > can be tampered with; This is just wrong. There is no reason to sign mails to ensure authenticity if one can just change the body... Ansgar

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Ansgar
On Sun, 2022-07-17 at 10:02 +0200, Mattia Rizzolo wrote: > At this point, what about SPF?  Ignoring potential whitelists on mail > receivers, I think using this service doesn't provide extra > advantages than signing on our own servers. Why SPF? It doesn't provide any extra advantages over DKIM.

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Dominik George
Hi, thanks for finally providing this! > Mails sent via this server will be DKIM-signed if the from is a > debian.org, debconf.org or ftp-master.debian.org address. If any > additional domain should be considered, feel free to ask. I just wanted to make you aware of something interesting I

Re: A mail relay server for Debian Members is live

2022-07-17 Thread Mattia Rizzolo
On Sat, Jul 16, 2022 at 11:49:31PM +0200, Pierre-Elliott Bécue wrote: > This service is now operational behind mail-submit.debian.org (AKA > stravinsky.debian.org). Documentation about how to use this service can > be accessed via [1]. That's great! > If you have any question or issue, please